Yamaha 6J8-44311-00-00 Water Pump Housing This OEM Yamaha water pump housing part number 6J8-44311-00-00 is the outer shell that holds the pump steady and channels the flow of water through the engine. Your outboard s cooling system relies on a tight, undamaged housing to direct coolant where it s needed. When a housing becomes cracked or worn, water pressure drops and the engine can overheat. Replacing the housing restores proper coolant flow and prevents overheating, prolonging the life of the impeller and other components. This genuine Yamaha housing is constructed from durable, corrosion?resistant materials and is shaped to match your engine s lower unit. It is a direct replacement for the original part and installs quickly with basic tools. Always inspect the pump housing when servicing the water pump and replace it if it shows signs of damage or excessive wear. Channels coolant to keep the outboard from overheating and holds the water pump steady. OEM Yamaha part made from durable, corrosion?resistant materials for a precise fit. The 6J8?44311?00?00 water pump housing is a genuine Yamaha OEM part compatible with older 2?stroke outboard engines in the 25 50 HP range:25 HP and 30 HP Three?Cycle" engines40 HP, 50 HP, and P50 modelsParticularly for engines manufactured in 1994 or earlier